Maryette Goodwin was born in 1865, the daughter of Sandusky attorney Homer Goodwin and his wife, the former Marietta Cowles. She graduated from Wellesley College in 1888, and married attorney Denver John Mackey in 1892. In the early years of the twentieth century, Maryette Goodwin Mackey served on the Board of Trustees of the Sandusky Library Association. By 1910, Mr. and Mrs. Mackey were residing in Los Angeles County, California with their two young daughters, Florence and Margaret.
In 1908, Maryette Goodwin Mackey and her sister in law Mary Mackey Stuart co-authored the book, The Pronunciation of 10,000 Proper Names.
In 1924, the Handbook of Proceedings of the California Library Association listed Maryette G. Mackey as the Principal of the Foreign Extension Department of the Los Angeles Public Library. During her tenure, she wrote this article:
Mrs. Maryette Goodwin Mackey passed away in California in 1933. She seems to have been connected to books and libraries for most of her life.